<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form >
    用户名：
    <input type="text" name="username"><br>
    密&nbsp;&nbsp;&nbsp;码：
    <input type="password" name="psw"><br>
    <input type="button" value="登录">
</form>
</body>
</html>